djvu | 2f9c6d06d25dfea43bb52e9b81df3dd3ebdef5d066573494598e77c450937e8f

Resubmissions

21-09-2024 16:40

240921-t6s7tasfpl 10

21-09-2024 16:37

240921-t46ecssfjj 10

21-09-2024 12:12

240921-pdcbda1fkd 10

Analysis

max time kernel
594s
max time network
360s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
21-09-2024 16:37

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General

Target

82C4.exe
Size

768KB
MD5

663a7ee6f23102380056645ded592075
SHA1

42f7de8be635ed37f91c289a81e71bc67139adb9
SHA256

2f9c6d06d25dfea43bb52e9b81df3dd3ebdef5d066573494598e77c450937e8f
SHA512

9d4e890505ccda9a0b3cd971598153c1e33be481d10c1133851f621fc4aad148554977b3162d36cb97759fde5603cfebf7876ad39199eee0519ecd3b1f857d09
SSDEEP

12288:wyEfg9+yzz81R9K4UW/ug6nkYxMDoG8AGjn6PkRnTFXD1l9e8k7phRuHH8n4p:IQmQ43/rYE8vdnTFRU6H84

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://rlrz.org/fhsgtsspen6/get.php

Attributes

extension
.nqsq
offline_id
OGykROpbgxJhrG1qc9yB9PwnsSv1Eo04vOCP0rt1
payload_url
http://znpst.top/dl/build2.exe

http://rlrz.org/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-O1iz3esfm2 Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0337gSd743d

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral1/memory/2824-5-0x0000000000540000-0x000000000065B000-memory.dmp	family_djvu
behavioral1/memory/2196-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2196-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2196-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2196-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/536-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/536-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/536-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/536-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/536-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/536-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/536-59-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/536-60-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/536-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/536-61-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2652	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a55f57b2-7437-43f4-be79-6504928d651a\\82C4.exe\" --AutoStart"	82C4.exe

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
3	api.2ip.ua
4	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2824 set thread context of 2196	2824	82C4.exe	30
PID 2756 set thread context of 536	2756	82C4.exe	33

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2196	82C4.exe
2196	82C4.exe
536	82C4.exe
536	82C4.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2824 wrote to memory of 2196	2824	82C4.exe	30
PID 2824 wrote to memory of 2196	2824	82C4.exe	30
PID 2824 wrote to memory of 2196	2824	82C4.exe	30
PID 2824 wrote to memory of 2196	2824	82C4.exe	30
PID 2824 wrote to memory of 2196	2824	82C4.exe	30
PID 2824 wrote to memory of 2196	2824	82C4.exe	30
PID 2824 wrote to memory of 2196	2824	82C4.exe	30
PID 2824 wrote to memory of 2196	2824	82C4.exe	30
PID 2824 wrote to memory of 2196	2824	82C4.exe	30
PID 2824 wrote to memory of 2196	2824	82C4.exe	30
PID 2824 wrote to memory of 2196	2824	82C4.exe	30
PID 2196 wrote to memory of 2652	2196	82C4.exe	31
PID 2196 wrote to memory of 2652	2196	82C4.exe	31
PID 2196 wrote to memory of 2652	2196	82C4.exe	31
PID 2196 wrote to memory of 2652	2196	82C4.exe	31
PID 2196 wrote to memory of 2756	2196	82C4.exe	32
PID 2196 wrote to memory of 2756	2196	82C4.exe	32
PID 2196 wrote to memory of 2756	2196	82C4.exe	32
PID 2196 wrote to memory of 2756	2196	82C4.exe	32
PID 2756 wrote to memory of 536	2756	82C4.exe	33
PID 2756 wrote to memory of 536	2756	82C4.exe	33
PID 2756 wrote to memory of 536	2756	82C4.exe	33
PID 2756 wrote to memory of 536	2756	82C4.exe	33
PID 2756 wrote to memory of 536	2756	82C4.exe	33
PID 2756 wrote to memory of 536	2756	82C4.exe	33
PID 2756 wrote to memory of 536	2756	82C4.exe	33
PID 2756 wrote to memory of 536	2756	82C4.exe	33
PID 2756 wrote to memory of 536	2756	82C4.exe	33
PID 2756 wrote to memory of 536	2756	82C4.exe	33
PID 2756 wrote to memory of 536	2756	82C4.exe	33

C:\Users\Admin\AppData\Local\Temp\82C4.exe
"C:\Users\Admin\AppData\Local\Temp\82C4.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2824
- C:\Users\Admin\AppData\Local\Temp\82C4.exe
  "C:\Users\Admin\AppData\Local\Temp\82C4.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2196
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\a55f57b2-7437-43f4-be79-6504928d651a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2652
- - C:\Users\Admin\AppData\Local\Temp\82C4.exe
    "C:\Users\Admin\AppData\Local\Temp\82C4.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2756
  - - C:\Users\Admin\AppData\Local\Temp\82C4.exe
      "C:\Users\Admin\AppData\Local\Temp\82C4.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:536

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
1KB

MD5
7fb5fa1534dcf77f2125b2403b30a0ee

SHA1
365d96812a69ac0a4611ea4b70a3f306576cc3ea

SHA256
33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f

SHA512
a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

Filesize
436B

MD5
971c514f84bba0785f80aa1c23edfd79

SHA1
732acea710a87530c6b08ecdf32a110d254a54c8

SHA256
f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895

SHA512
43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
174B

MD5
13e2113d8162ec2c121cc4f3c8bd2f36

SHA1
08ca83bcc85ac4c39b4e741dfdcf1ca4bbda360d

SHA256
c854789e63c288985cecf38f7f28dfc8467e6f618cb4463668ea85e572f3f47f

SHA512
75789c6385b531546550b915060411d6d6cc2746d5e4116541718483ceed6f82b0fec1d2cfd1bb8a4f986e8fa33cb0ce0c82c035b71f4c62c63dccd44df9c8ad

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
342B

MD5
4d5c2fb0a97de5ae9c741a9fcbe50ff9

SHA1
84913ca05dbb85cb2110d427bc4ede37e9f53bf0

SHA256
15f443484ecb4dbd1fa40b1c9e3faa56df742c784b323732c0e6df8330746991

SHA512
5599d8b945255de1d76572443a202b41a312de3176e377e67cea4bf1f453833fcfab7e2c9c5977707e45ac8a5623c974eba1fd6c11feb75bb5f585509fb24d7f

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

Filesize
170B

MD5
38ef6e82dbf4fd8ddc74176408d6c787

SHA1
302a6461bddbcbfb0b5327c88b22ab041d1e6075

SHA256
9f5c5e25397a8a93d6c927cc1f979a579679c7bfd1cb1c0436647db2e416275f

SHA512
35d27c3947536f5c62125940c0b90df0f08b2d43c8aa74e924eb9fa5fdb623eefc7cf2adb81b0a2c6cf96636b1f3cf239e3702f4f8ed813917be69675af711a8

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab783C.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\a55f57b2-7437-43f4-be79-6504928d651a\82C4.exe

Filesize
768KB

MD5
663a7ee6f23102380056645ded592075

SHA1
42f7de8be635ed37f91c289a81e71bc67139adb9

SHA256
2f9c6d06d25dfea43bb52e9b81df3dd3ebdef5d066573494598e77c450937e8f

SHA512
9d4e890505ccda9a0b3cd971598153c1e33be481d10c1133851f621fc4aad148554977b3162d36cb97759fde5603cfebf7876ad39199eee0519ecd3b1f857d09

Download Submit
memory/536-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/536-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/536-61-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/536-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/536-60-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/536-59-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/536-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/536-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/536-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/536-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2196-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2196-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2196-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2196-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2196-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2756-35-0x0000000000400000-0x0000000000532000-memory.dmp

Filesize
1.2MB

Download
memory/2756-31-0x0000000000400000-0x0000000000532000-memory.dmp

Filesize
1.2MB

Download
memory/2756-29-0x0000000000310000-0x00000000003A2000-memory.dmp

Filesize
584KB

Download
memory/2824-5-0x0000000000540000-0x000000000065B000-memory.dmp

Filesize
1.1MB

Download
memory/2824-6-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/2824-1-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/2824-0-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download